National Medical Journal of China, Volume 100, Issue 9,2020, Pages 674-678, doi:10.3760/cma.j.issn.0376-2491.2020.09.006
National Medical Journal of China, Volume 100, Issue 9,2020, Pages 717-720, doi:10.3760/cma.j.issn.0376-2491.2020.09.015
National Medical Journal of China, Volume 100, Issue 9,2020, Pages 679-684, doi:10.3760/cma.j.issn.0376-2491.2020.09.007
National Medical Journal of China, Volume 100, Issue 9,2020, Pages 669-673, doi:10.3760/cma.j.issn.0376-2491.2020.09.005
National Medical Journal of China, Volume 100, Issue 9,2020, Pages 648-659, doi:10.3760/cma.j.issn.0376-2491.2020.09.003